There is a third group of ova including a series of types of segmentation nearly parallel to the telolecithal group.
Ova belonging to the former group are known as telolecithal ova, those to the latter as centrolecithal.
The Cephalopoda appear to be the only Invertebrates in which the egg is mesoblastic and telolecithal like that of Vertebrata.
telolecithal tel·o·lec·i·thal (těl'ə-lěs'ə-thəl, tē'lə-)
Having a yolk that is concentrated at one end.